Michael holeoyd smith



(No Model.) I

M. H. SMITH.

MAGNETIC SEPARATOR.

Patented June 19 Qwuamboz.

Witness my.

whammy.

UNITE STATES PATENT OFFICE.

MICHAEL HOLROYD SMITH, OF HALIFAX, COUNTY OF YORK, ENGLAND.

MAGNETIC SEPARATOR.

SPECIFICATION forming part of Letters Patent No. 384,645, dated June 19,1888.

Application filed October 29, 1887. Serial No. 253,765. (No model.)Patented in Eng and August 9, 1887, No. 10,893.

To all whom it may concern.-

Be it known that I, MICHAEL HOLROYD SMITH, a subject of the Queen ofGreat Britain, residing at Halifax, in the county of York, England, haveinvented certain new and useful Improvements in Magnetic Separators,(for which application for patent has been filed in Great Britain,August 9, 1887, No. 10,893,) of which the following is a specification.

The object of this invention isfthe separation of iron or any metalsusceptible of magnetic action from other substances, and is speciallyapplicable to such substances when in the form of an impalpable powder.For this purpose I. employ a cylinder whose periphery is composed of aseries of electro-magnets, the terminals of which are so arranged thatas the cylinder revolves one-half or any desirable number upon one sideof the cylinder may be magnetized and the remainder demagnetized. Nearthe under side of the cylinder-I place a trough divided into a number ofpartitions, each fitted with a vane or screw-propeller and actuated by ashaft lying parallel with the axle of the cylinder. The material to betreated is fed into a hopper at one end of the trough, and by the vanesor propellers is carried across the face of the cylinder and out at thefarther end of the trough. The revolving cylinder,attracting the ironparticles, lifts them out and car ries them over, allowing them to fallon the farther side.

In the drawing, the figure is a perspective illustrating the operativeparts of the machine.

1 is the cylinder, carryinga number of electro-magncts round itsperiphery.

2 is the supply-hopper; 3, the trough passing across the face of thecylinder; 4 4 4, the

partitions; 5, the vanes or screw-propellers actuated by the shaft 6.The partitions are either made high enough or covered by a lid toprevent the material passing from one to the other, except by the narrowspaces 7 between the partitions and the surface of the cylinder. It isobvious, therefore, that all the material passing along the trough frompartition to partition must be repeatedly brought in close proximity tothe poles of the magnets on the surface of the cylinder. The trough maybe approached nearer to or withdrawn farther from the cylinder, and soregulate the space between the edge of the partitions and the surface ofthe cylinder; or the partitions may each have an adjustable edge. Thetrough is hinged upon arms 9, centered on the shaft forming the axle ofthe cylinder, and may thus be swung to take any desired position roundthe cylinder.

The magnets on the cylinder are only excited while in the positionindicated by the line A B. The iron particles that have been extractedfrom the material are free to fall from the side 0; but in order tofurther insure their removal .a revolving brush is placed at D. Thebristles of this brush rub against the cylinder and carry off anyremaining particles of iron, and again strike against the edge of thetrough D, which removes the iron from the brush.

The magnets on the surface of the cylinder are preferablyelectro-magnets, excited from an external source, and the terminals ofthe helices surrounding and exciting these magnets may be so arrangedthat the magnets can be worked either in parallel or in series, and bysuitable commutator-connections more or less of the magnets may beenergized at once, as desired.

From the above the general principles of my invention will beunderstood, and it is obvious that they may be embodied in variousconstructions, and that the elements may be used together or separately,or in combination with other equivalent devices.

lVhat I claim is- 1. In a magnetic separator, the combination of amagnetic cylinder and a trough provided with propellers, whereby thematerial to be separated is successively brought into contact with thecylinder, substantially as described.

2. In a magnetic separator, the combination of a rotating cylinderhaving its face made up of a series of magnets, a trough arranged alongthe face of the cylinder, and a series of propellers in said trough,substantially as described.

3. In a magnetic separator, the combination of a rotating cylinder theface of which is made up of electro-magnets, a trough arranged along theface of the cylinder and having a series of partitions, and apropcllershaft carrying a series of vanes in said trough and operatingto bring the material to be separated in successive contact with themagnets and propel it through the trough, substantially as described.

4. In a magnetic separator, the combination, V

with a magnetic cylinder, of a distribntertrough having propellersarranged to bring the material repeatedly in contact with differentportions of the magnetic cylinder, substantially as described.

5. In a magnetic separator, the combination ofa rotating magneticcylinder anda trough arranged along the surface thereof, the troughbeing hinged to the shaft of the cylinder, substantially as described.

6. In a magnetic separator, the combination of a rotating magneticcylinder, atrongh having propellers arranged parallel with the axle ofthe cylinder, supplying material thereto and causing it to traverse theface of the cylinder, and a brush arranged to discharge from thecylinder the iron extracted from the material, substantially asdescribed.

7. In a magnetic separator, the combination, with a magnetic cylinder,of a trough arranged along the face thereof, the said trough beingdivided into compartments by partitions, the edges of which are cut awayadjacent to the cylinder to admit of the passage of the material throughthe successive compartments and in contact with the cylinder,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

M. HOLROYD SMITH.

Witnesses:

F. L. FREEMAN, J. S. BARKER.

